Celtra Pressing System

What is Celtra Press?
Celtra Press is a press ceramic, available as a pellet
in two sizes – 3 g and 6 g. This ceramic material was
specially developed for the production of indirect ceramic
restorations at the dental laboratory. Celtra Press is
characterized by its excellent pressing behavior with all
restoration types.
The special power firing step before veneering or glazing
will “heal” microscopic faults within the glass matrix caused
by sandblasting or finishing and increases the strength in
the volume. This ensures the consistently high strength of
more than 500 MPa of the material.
The simplified sprueing of bridges, the low viscosity and
good flowability of the ceramic material during pressing,
and faster divesting/sandblasting steps will shorten the
time needed to produce the restorations.
Characteristics
Celtra Press is a multiphase ceramic consisting of a glass
matrix and lithium disilicate crystals having a crystal length
of about 1.5 µm plus nano-scale lithium phosphate (see
the SEM images). In addition to Li2O and SiO2, Celtra Press
contains about 10% zirconia (ZrO2), which is dissolved
completely in the glass phase as in Celtra Duo rather than
in crystalline form.
Celtra Press is characterized by a high strength of about
500 MPa (after power firing) and excellent flow properties
during pressing. In conjunction with the newly developed
investment, only a minimal reaction layer is formed,
resulting in an excellent fit and shortening the time needed
for finishing, because the surface etching step is eliminated.
Celtra Press is easy to polish, should minor corrections in
the patient’s mouth turn out to be necessary. Though no
post-processing in the laboratory is required and excellent
esthetics is nevertheless ensured